Wireless Internet not working

I have a network setup with a desktop as the server, using a Linksys wired/wireless router. My laptop is the only machine utilizing the wireless. Up until recently it was working fine, but I recently reinstalled OS and am having trouble getting it back up. I initially got it working right away, and my laptop had internet for about 30 minutes. But then it went out.

Now I'm at the point where I'm connected to the wireless router, but I get no internet connection. I've pinged the server and it works fine, and I can even ping a google server via IP (72.14.207.99) but I cannot ping Google. Under ipconfig /all there are 3 DNS servers listed...I've tried inputting them manually as well.

I feel like a bit of a noob here, but any help would be greatly appreciated. Thanks guys.